1390538694 has 16 divisors (see below), whose sum is σ = 2790139968. Its totient is φ = 462002472.

The previous prime is 1390538689. The next prime is 1390538713. The reversal of 1390538694 is 4968350931.

It is a super-2 number, since 2×1390538694² = 3867195719022451272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375612 + ... + 379295.

It is an arithmetic number, because the mean of its divisors is an integer number (174383748).

Almost surely, 2^1390538694 is an apocalyptic number.

1390538694 is an abundant number, since it is smaller than the sum of its proper divisors (1399601274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1390538694 is a wasteful number, since it uses less digits than its factorization.

1390538694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755219.

The product of its (nonzero) digits is 699840, while the sum is 48.

The square root of 1390538694 is about 37289.9275140084. The cubic root of 1390538694 is about 1116.1631822250.

The spelling of 1390538694 in words is "one billion, three hundred ninety million, five hundred thirty-eight thousand, six hundred ninety-four".